Continuous casting method using graphite mold impregnated with unsaturated drying oil

Abstract

An improved graphite mold for and process of continuously casting metal wherein the interstitial space in the mold is impregnated with an unsaturated oil, or mixture of unsaturated oils, having a drying capability equivalent to at least soybean oil. Heat is applied to dry the oil, and subsequently metal is cast in the mold thereby carbonizing the oil or mixtures thereof in the interstitial space.

I claim: 
     
       1. In a method of continuously casting of a metal using a graphite mold or die having interstitial space, the improvement comprising, impregnating the interstitial space in said graphite mold or die with an unsaturated oil or a mixture of unsaturated oils, wherein the unsaturated oil or mixtures thereof have a drying capability equivalent to at least soybean oil, applying heat to dry the same, and casting said metal thereby carbonizing said oil or mixtures thereof in said interstitial space. 
     
     
       2. The method as defined in claim 1 wherein the unsaturated oil is linseed oil. 
     
     
       3. The method as defined in claim 1 wherein the unsaturated oil is safflower oil. 
     
     
       4. The method as defined in claim 1 wherein the unsaturated oil is tung oil. 
     
     
       5. The method as defined in claim 1 wherein the unsaturated oil is a dehydrated castor oil. 
     
     
       6. In a process of continuously casting a nonferrous metal when using a graphite mold or die, the improvement comprising: impregnating the graphite mold or die with an unsaturated oil having a drying capability equivalent to at least soybean oil in the amount from 0.5 to 10% by weight, drying the oil, and exposing the mold or die to a hot metal when casting the metal whereby said oil is carbonized. 
     
     
       7. In the process as defined in claim 6, wherein the metal being cast is copper or copper alloy. 
     
     
       8. In the process as defined in claim 6, wherein the metal being cast is bronze. 
     
     
       9. In the process as defined in claim 6, wherein the metal cast is 70/30 brass. 
     
     
       10. The process as defined in claim 6, wherein the unsaturated oil is dried at a temperature up to 100° C.